Hey sweetheart, it's called going on break. Retail work is tiresome..especially when theres stocking to do and lifting heavy bags, just becuase you dont see it being done doesn't mean it isn't being done. And even though you needed help, she knew there was another person on the floor to cover you, and you were taken care of. Let's try not to be so hard on these people.
The first employee I asked to help me dissappeared and I didnt see her again until about 10 minutes later walking drinking a can of soda in the back, I was very upset since I needed help finding something. Then I asked another employee and she was so helpful, she even printed me up some material to help me care for my new pet fish.